remove extraneous space

* man/ruby.1 (SYNOPSIS): remove extraneous space for -K option
  too.

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@52409 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

man/ruby.1

@@ -16,7 +16,7 @@
 .Op Fl E Ar external Ns Op : Ns Ar internal
 .Op Fl F Ns Ar pattern
 .Op Fl I Ar directory
-.Op Fl K Ar c
+.Op Fl K Ns Ar c
 .Op Fl T Ns Op Ar level
 .Op Fl W Ns Op Ar level
 .Op Fl e Ar command